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Finding the Fourth Proportional to 127.50, 175.41 and 122.10

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Solution

The fourth proportional to 127.50, 175.41 and 122.10 is: 167.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.50 : 175.41 = 122.10 : x
  2. Step 2: Convert to fraction form
    127.50/175.41 = 122.10/x
  3. Step 3: Cross multiply
    127.50x = 175.41 × 122.10
  4. Step 4: Simplify right side
    127.50x = 21,417.56
  5. Step 5: Solve for x
    x = 21,417.56/127.50
  6. Step 6: Final answer
    x = 167.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.